I am building a big-data solution to compute a massive number of routes in Uk. (About 350 million routes). As we are currently using Spark platform, GH is a very convenient solution since it is done in Java.

As you can imagine, I am particularly worried about performance.

I have observed a dramatic performance penalty when running GH for multiple routes alternatives:

Setup to use Contraction Hierarchies (only computes the shortest path) -> it computes around 100 routes / second (per core)

Setup to use "alternative paths" -> around 0.3 routes per second.

My question are:* Are this difference reasonable?* Is there any plan in the roadmap to implement "multiple route computation" using CH?